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XCP-ng requirement tweaks #419

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XCP-ng requirement tweaks #419

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requirements: Modernize requirements
TSnake41 Nov 26, 2025
bf30cce
requirements: Reformat maximum disk size
TSnake41 Nov 26, 2025
35dc337
requirements: Improve vCPU limit
TSnake41 Nov 26, 2025
738c3ff
requirements: Clarify NIC limit
TSnake41 Nov 26, 2025
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15 changes: 6 additions & 9 deletions docs/installation/requirements.md
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Expand Up @@ -25,20 +25,17 @@ The system requirements for XCP-ng are:
### CPUs

- One or more 64-bit x86 CPUs, minimum 1.5 GHz; 2 GHz or faster multicore CPUs are recommended.
- To run Windows VMs or recent Linux versions, an Intel VT or AMD-V 64-bit x86-based system with one or more CPUs is required.

> **Note**: For Windows VMs or newer Linux distributions, enable hardware virtualization in the BIOS. It may be disabled by default—consult your BIOS documentation for guidance.

- For VMs running supported paravirtualized Linux, a standard 64-bit x86-based system with one or more CPUs is required.
- Hardware virtualization must be enabled (Intel VT-x or AMD-V), it may be disabled by default—consult your BIOS documentation for guidance.
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@thomas-dkmt thomas-dkmt Nov 26, 2025

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Suggested change
- Hardware virtualization must be enabled (Intel VT-x or AMD-V), it may be disabled by default—consult your BIOS documentation for guidance.
:::tip
Depending on your BIOS, hardware virtualization may be disabled by default, so make sure to double-check and enable it. Refer to your BIOS documentation for guidance.

- Enabling IOMMU (Intel VT-d or AMD-Vi) is recommended

### Memory

- Minimum 2 GB, recommended 4 GB or more.
- Minimum 2 GB, recommended 8 GB or more.
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@thomas-dkmt thomas-dkmt Nov 26, 2025 •
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Suggested change
- Minimum 2 GB, recommended 8 GB or more.
- Minimum: 2 GB (Recommended: 8 GB or more).

- A fixed amount of RAM is allocated to the control domain (dom0). Optimal allocation depends on your workload.

### Disk Space

- Local storage (PATA, SATA, SCSI) with a minimum of 46 GB, recommended 70 GB or more.
- Local storage (PATA, SATA, SCSI, NVMe) with a minimum of 46 GB, recommended 70 GB or more.
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@thomas-dkmt thomas-dkmt Nov 26, 2025

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Suggested change
- Local storage (PATA, SATA, SCSI, NVMe) with a minimum of 46 GB, recommended 70 GB or more.
- Local storage (PATA, SATA, SCSI, NVMe) with a minimum of 46 GB. Recommended: 70 GB or more.

- SAN access via HBA (not software) when installing with multipath boot from SAN.

For more details, refer to the [Hardware Compatibility List (HCL)](../../installation/hardware).
Expand Down Expand Up @@ -98,7 +95,7 @@ The maximum number of supported logical processors may vary depending on the CPU
XCP-ng 8.2 is EOL. This 8.2-specific information is retained solely to assist with the transition from 8.2 to a supported release.
:::

- Up to 960 logical processors, depending on CPU support (theoretical, untested: 1024).
- Up to 960 logical processors, depending on CPU support (theoretical, untested: 2048).
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@thomas-dkmt thomas-dkmt Nov 26, 2025

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- Up to 960 logical processors, depending on CPU support (theoretical, untested: 2048).
- Up to 960 logical processors, depending on CPU support. **Note**: The theoretical, untested limit is 2,048 logical processors.

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@stormi stormi Nov 28, 2025

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Where does this number, 2048, come from? Does it apply to XCP-ng 8.3?

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@TSnake41 TSnake41 Nov 28, 2025

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https://github.com/xcp-ng-rpms/xen/blob/master/SOURCES/configure-build.patch#L370


#### XCP-ng 8.2 LTS

Expand Down Expand Up @@ -183,7 +180,7 @@ A resource pool is a collection of one or more servers (up to 64), which can be

### Hardware Requirements

- All servers must have compatible CPUs (same vendor — Intel or AMD). To run HVM VMs, CPUs must support virtualization.
- All servers must have compatible CPUs (same vendor — Intel or AMD).
Comment on lines -186 to +188
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@ydirson ydirson Nov 26, 2025

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Shouldn't we leave out the "To run HVM VMs," part?

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@TSnake41 TSnake41 Nov 26, 2025

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"virtualization" is already a hard requirement for XCP-ng 8.3, so this statement is redundant


### Additional Pool Requirements

Expand Down